王力《汉语诗律学》云:“谈律诗必须兼谈拗救,这等于法律上的‘但书’;‘但书’应认为法律的一部分,并非法律以外的东西。”也就是说,唯有掌握正格与变格两种准则,方能随意驾驭平仄格律,做个获得自由的诗人。变格的绝妙技巧,即为拗救。拗救,分本句自救与对句相救、一般拗救与特殊拗救两类。拗而能救,便不为“病”。所谓拗救,就是调整平仄位置,既要 Wang Li’s “Chinese Poetics”: “Talking about a poem must be both a remedy and a remedy, which is equal to the law’s” provocation. “But a book should be considered a part of the law and not something other than the law.” Only by grasping the two principles of being positive and negative can we manipulate the flat rules arbitrarily and be a poet. The wonderful technique of transforming is to resist. Ao salvation, sub-sentence self-help and the sentence to save the common remedy and special a helpless two categories. Too and can save, it is not “disease ”. The so-called overbearing, is to adjust the level position, it is necessary